MLA

Kissinger, Henry, 1923-2023. Le. Box 499, folder 3. 1987-1988. https://collections.library.yale.edu/catalog/11778591.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 499, folder 3"])(1987-1988)[Le]. https://collections.library.yale.edu/catalog/11778591.